I went into the yeti cave and wanted to ask Mr. Yeti for a task. After he told me his task (bringing 25 snowballs to him) I answered with no and he told me to go away. After that, he didn't answer anymore when I said "hi" to him, he just stood there. Saying "bye" let him say "Bye." but trying a conversation with "hi" again, still didn't make him talk. The code words "offer, help, job, task, favour" also didn't work. The log of the conversation is in the textfile given here.